com.esotericsoftware.kryo.Kryo.DefaultInstantiatorStrategy Java Examples

/**
 * Create a Kryo instance, with its instantiator strategy and a set of
 * common serializers (from kryo-serializers project) initialized.
 * @return an instance of {@link Kryo}.
 */
private static Kryo createKryo() {
  final Kryo kryo = new Kryo(new CustomClassResolver(), new MapReferenceResolver());
  kryo.setAutoReset(true);
  kryo.setInstantiatorStrategy(new DefaultInstantiatorStrategy(new StdInstantiatorStrategy()));

  kryo.register(ObjectName.class, new ObjectNameSerializer());
  kryo.register(OffloadableNotification.class, new GenericObjectSerializer());
  kryo.register(TaskExecutionNotification.class, new GenericObjectSerializer());
  kryo.register(TaskGraph.class, new JobTaskGraphSerializer());
  kryo.register(Collection.class, new CollectionSerializer());
  kryo.register(Arrays.asList( "" ).getClass(), new ArraysAsListSerializer() );
  kryo.register(Collections.EMPTY_LIST.getClass(), new CollectionsEmptyListSerializer() );
  kryo.register(Collections.EMPTY_MAP.getClass(), new CollectionsEmptyMapSerializer() );
  kryo.register(Collections.EMPTY_SET.getClass(), new CollectionsEmptySetSerializer() );
  kryo.register(Collections.singletonList( "" ).getClass(), new CollectionsSingletonListSerializer() );
  kryo.register(Collections.singleton( "" ).getClass(), new CollectionsSingletonSetSerializer() );
  kryo.register(Collections.singletonMap( "", "" ).getClass(), new CollectionsSingletonMapSerializer() );
  kryo.register(GregorianCalendar.class, new GregorianCalendarSerializer());
  kryo.register(InvocationHandler.class, new JdkProxySerializer());
  UnmodifiableCollectionsSerializer.registerSerializers(kryo);
  SynchronizedCollectionsSerializer.registerSerializers(kryo);
  kryo.register(EnumMap.class, new EnumMapSerializer());
  kryo.register(EnumSet.class, new EnumSetSerializer());
  return kryo;
}
 

protected Kryo initialValue() {
	Kryo kryo = new Kryo();
	kryo.setReferences(false);
	kryo.setRegistrationRequired(false);
	kryo.setInstantiatorStrategy(new DefaultInstantiatorStrategy(new StdInstantiatorStrategy()));
	return kryo;
}
 

public static <T extends AbstractConfig<?>> T fromFile(final String path, final Class<T> clazz) throws FileNotFoundException {
	final Kryo kryo = new Kryo();
	kryo.setInstantiatorStrategy(new DefaultInstantiatorStrategy(new StdInstantiatorStrategy()));
    try (final Input input = new Input(new FileInputStream(path))) {
		final T bc = kryo.readObject(input, clazz);
		return bc;
	}
}
 

public static void main(String[] args) throws Exception {
		Kryo kryo = new Kryo();
		kryo.setReferences(false);
		kryo.setRegistrationRequired(false);
		kryo.setInstantiatorStrategy(new DefaultInstantiatorStrategy(new StdInstantiatorStrategy()));
//		kryo.register(Transaction.class);
//		kryo.register(Xid.class);
//		kryo.register(TransactionType.class);
//		kryo.register(TransactionStatus.class);
//		kryo.register(Participant.class);
		
//		Output output = new Output(new ByteArrayOutputStream());//new Output(new FileOutputStream("file.bin"));
//		
//		DefaultTransaction defaultTransaction = new DefaultTransaction();
//		defaultTransaction.setXid(new DefaultXid("1", "2", "3"));
//		
//		kryo.writeObject(output, defaultTransaction);
//		output.flush();
//		output.close();
		
		Options options = new Options();
		options.createIfMissing(true);
		options.cacheSize(100 * 1048576); // 100MB cache
		options.logger(new org.iq80.leveldb.Logger() {
			public void log(String message) {
				TransactionLog.REPOSITORY.info(message);
			}
		});
		DB db = Iq80DBFactory.factory.open(new File("txtreedb"), options);
		
//		String stats = db.getProperty("leveldb.stats");
//		System.out.println(stats);
		
		DBIterator iterator = null;
		try {
			iterator = db.iterator();
			for(iterator.seekToFirst(); iterator.hasNext(); iterator.next()) {
				String key = Iq80DBFactory.asString(iterator.peekNext().getKey());
				Transaction value = (Transaction) SerializationUtil.deserialize(iterator.peekNext().getValue());
				
				System.out.println(key+" = "+value);
			}
		} finally {
			if (iterator != null) {
				iterator.close();
			}
		}

//		String transactionId = "f282205a-e794-4bda-83a2-bb28b8839cad";
//		Input input = new Input(db.get(Iq80DBFactory.bytes(transactionId)));
//		Transaction transaction = (Transaction) kryo.readClassAndObject(input);
//		System.out.println(transaction);
	}
 

public Kryo create() {
	Kryo kryo = new Kryo();
	kryo.setInstantiatorStrategy(new DefaultInstantiatorStrategy(new SerializingInstantiatorStrategy()));
	return kryo;
}